18
PMML0198A-rev.1 - 04/2011
1 Electrical wiring
13.3 WIRE SIZE
Recommended minimum sizes for field provided
Model
Power Source
Max. Current
Power source
cable size
EH control
cable size
Sensor cable
size
CB
ELB
(nº. poles/A/mA)
EN60 335-1
EN60 335-1
EN60 335-1
DHWT
1~ 230V 50Hz
15A
2.5mm
2
1mm
2
0.75mm
2
20A
2/40/30
N O T E
Follow local codes and regulations when selecting field wires, Circuit Breakers and Earth Leakage Breakers
Use the wires which are not lighter than de ordinary polychloroprene sheated flexible cord (code designation H05RN-F).
13.4 ELECTRICAL WIRING DIAGRAM
Power
cable
EH Control cable
(to system control unit)
AUTO MANUAL
Main
switch
ON/OFF
DHWT
Sensor
Mark
Part Name
WT
Regulating and Safety thermostat
Re
Auxiliary Relay
SW1
Operating Mode switch
R 123
Electrical Heater
LD1
LED1: POWER ON
LD2
LED2: AUTO MODE ON
LD3
LED3: Electrical Heater Manual
TB
Terminal Board
L/N/T
Power supply
3/4
Control Heater Input
5/6
Electrical Heater Connection
T
DHWT
Domestic hot water sensor
13